Operating mechanism for dumping trucks



V. M. HADDON.

OPERATING MECHANISM FOR DUMPING TRUCKS.

APPLICATION FILED FEB. 14. 192;

1,411,346, v Patenfed Apr. 4, 1922.

UNITED STATES PATENT OFFICE.

VIRGIL M. nannon, or OMAHA, NnBRAsKa.

OPERATING MECHANISM FOR DUMPING 'rnucxs.

T 0 all tuhom it may concern Be it known that I, VIRGIL M. HIADDON', a citizen of the United States, residing at Omaha, in the county of Douglas and State.

U. S. Letters Patent issued to Virgil M.

Haddon, No..1,359,363, dated Nov. 16,1920, and has for its object to provide means which will be convenient in use for swing- 1 ing the box to a dumped position and means for maintaining the box at selected degrees of inclination to permit spreading the contents on the ground; also means for moving the box and automatically maintaining it in a horizontal position; also'the' invention includes certain adjustable features andthe use of a reversible locking-bar found to be of advantage in the control of the movements of the box. v v

In the accompanying drawing which illustrates the invention, Fig. 1 is a view in side elevation showing the box in a horizontal position with the operating mechanism' mounted thereon. Figs. 2 and 3 are details showing an adjustablemounting for a spring latch-balz' Figs. 4 and 5 are details showing a mounting of a locking-bar upon a handlever to permit reversal of said bar. F lg. 6 is a side'view showing the box in a dumped position and showing the operating 'mech anism.

Referring now to the drawing for a more particular description, the invention is illustrated and described in connection with the frame 1, rear axle 2 and box 3 of a dumping truck, said frame being provided with a superframe 4 and the box being mounted in an over-frame 5 having a pivotal mounting 6 upon the super-frame to permit swinging movements above the axle 2, said box having a bottom inclined downwardly toward its rear end, and provided witha door 7 pivotally mounted near its top, as indicated at .8, upon the sides to make a closure of the rear, open end of the box.

Numeral 9 indicates a hand-lever pivotally mounted, as indicated at 10, upon a bracket 11. which is provided on the super- Specification of Letters Patented Apr. 1922.

Application filed February 14; 1921 Serial K0. 444,979.

frame, and at 12 is indicated alink having a pivotal'mounting 13 for its upper end upon a bracket 14 which is secured to the side of the frame 5, at the front partthereof, its' lower end being mounted upon a pivot-member 15 between the ends of the lever 9. At 16 is indicated a push-and-pull bar, its front endv beingmounted upon the pivot-member 15, and its rear end having a pivotal mounting 17 upon the door 7, and

by use of the hand lever the front end of the box may be swung upwardly for dumping, the door 7being automatically opened. Since the parts thus described are shown and claimed inv the Letters Patent above men-' tioned, no claim is made for these feature in the present application.

In order that the front end of the box may be maintained in an elevated position after it has been swung upwardly and that the box may be maintained at different degrees of inclination I provide a lockingbar 18 provided, atone of its sides, with a plurality of projections 19, said bar being disposed within a staple or loop 20 which is secured to the'side of the frame 5, near the top thereof, and having its lower end mounted, as indicated at 21, upon the hand will become caught upon the lower part ofsaid loop, to maintain the box in a dumped position.

The advantages to be derived in maintaining the box at-various degrees of inclina tion will be appreciated, since it is occasionallynecessary for an operator to scrape plastic or adhesive material from the box and it is obvious that the box, for this operation, should be maintained stationary in dumped position; also when the dumping truck is used in connection with the work of paving, it is often desirable to spread the material on the ground, the box being maintained at a lesser degree of inclination while the truck ismoved forwardly.

The mounting of the bar 18 upon the hand lever is such that it may be disposed with its rectilinear side a: in engagement with the loop 20, this being for the purpose of preventing the box from being held in a dumped position, and being useful in instances where brick, stone or non-adhesive materlal is to be dum ed a leaf-s r1n 22 Fi s. 4. 5.

being secured to one of the sides of the bar 18 and having an aperture a to permit it to. be traversed by the pivot 21 of the hand.

lever 9, a pin 5 being..used forseeuring the spring upon said pivot, and it will be understood that the mounting of the bar. 18 may be readily'changed so that its projections 19 will be disposed uppermostgandzthatlthese projections will not engage the lower part of the'loop 20, andsince the rectilinear side 00 will then be in engagementwith the lower part of said loop, the box, when its front. end-has been: swung upwardly, will. not be maintained in its'dumped position, therbar 18; when-thus disposed operating. simply to prevent. any sidewise swinging movement of the hand lever. This. feature of. adjustment which permits reversal of thenlocking-bar is of great advantage since-"it may be re-v quired to haul and dump nonradhesive as well as. adheslve material.

Numeral 23% indicates a. catch which is cured;to the front'end ot-the.super-frame 4:,

and at. is indicated; a. springlatchrba which is secured to the front part of; the.

over-frame 5 and. which projectsdownwardly therefrom for engaging thecatch-Ztl to maintain the .box in .a horizontal position, and at 25 is indicated acrank-handlewhich is. mounted upon the hand lever, and any suitable,iiexible imemberQG may be used-for connecting the crank handle with. the latch bar, and in operation, to causev dumping of the'box; the latch-bar is released from the catch 23 by manual; use ot-member25, the operator thereafter swinging the hand-level."

tacting parts of the lateh-bar,-v and catch.

become worn with use, it is necessary to provide for adjustments to he described.

As best shown inFigsQ and 3, the front part of theover-framebis provided with a grooved plate or rack 27 having a slot 28 formedtherein for receiving bolts 29 which are provided for the latch-bar 24, the latter being. provided: with ridges, as shown, adapt ed to engage in the grooves of the plate 27,.

and by use of the means described the"latch bar'may'be movedlengthavise sci-that its head'- will' be firmly seated upon the catch, and the bolts 29 being applied and adjusted, anyrocking movements of: the box relative to the superframe 4,1while-the boxdisposed; in: a horizontal position, will be pre'i vented. I I

While I have shown and described constructionin detail, I dolnot wish to be un- 'derstood as limiting. myself-in this respect, and'ehan'ges .in :form, size, vproportion and minor details may lie-made, SlllClg CllEtIlQG-S tobe determined by the scope ot the invention In combination, a vehicle frame. provided with a catch, a box'providedtwith astaple, a latch mounted on theibox adapteditorhave longitudinal I adjustments. for engaging; thev catch to normallymaintain: the box in 'sta.-; tionary. relation with the'frame, aqlmndilever; pivotally mounted o'nltheframe, a flexible:

member carried by said hand'lever torreleasing'. the latch from isaid I catch, a linkconnecting the hand. leverwith said: box, a

locking-bar carried by the hand lever, said hand lever being movablevfoia moving the box and formoving the locking-bamapart-E of sa d bar moving into engagement with the'staplefor maintaining the boxrin 'in j clined relation with the. frame;

In testimonyfwhereof,Ihave afiix d my gnature in presence of: two ;w ti iesses.

VIRGIL: M. i-n 'nne'vs v Witnesses; i

Hmaarrl, S 'nunens,

ARTHUR H. Sruncns. 

